I'm looking into getting a GTX 750 Ti video card to replace my Radeon HD 4870. Does anyone know if this will help my FPS at all in Minecraft? I have a Core i7 920 processor overclocked to 3.6 GHz, and 12 GB of RAM.
AMD's open source drivers are far beyond the quality of Nvidia's now.
What do you mean now? Hell half the time games can't even load properly on the open source Nvidia drivers. In Minecraft the Radeon Open Source driver can complete with the closed source Windows driver in Minecraft.
If you are going to make the argument for Linux but then turn around and run closed source Nvidia driver that seems kinda contradictory to your goals.
Not for the Radeon HD 4800 series it isn't. Is that just because they dropped support for them?
Who dropped support? AMD said that they are dropping support from the Catalyst driver however the open source driver still provides support.
It is important to keep in mind Nvidia does not endorse or support the FOSS driver in any capacity. AMD provides minor support to the FOSS driver. In the end both are non official drivers, Intel is the only company with an official FOSS driver.